2187201204 has 54 divisors (see below), whose sum is σ = 5741180354. Its totient is φ = 729058320.

The previous prime is 2187201173. The next prime is 2187201223. The reversal of 2187201204 is 4021027812.

It can be written as a sum of positive squares in only one way, i.e., 2131668900 + 55532304 = 46170^2 + 7452^2 .

It is a tau number, because it is divible by the number of its divisors (54).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 15427 + ... + 67914.

Almost surely, 2^2187201204 is an apocalyptic number.

It is an amenable number.

2187201204 is an abundant number, since it is smaller than the sum of its proper divisors (3553979150).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2187201204 is an frugal number, since it uses more digits than its factorization.

2187201204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83369 (or 83346 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 27.

The square root of 2187201204 is about 46767.5229619872. The cubic root of 2187201204 is about 1298.0644181442.

The spelling of 2187201204 in words is "two billion, one hundred eighty-seven million, two hundred one thousand, two hundred four".